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Investiture, from the Latin (preposition in and verb vestire, 'dress' from vestis 'robe') is a rather general term for the formal installation of an incumbent as the insignia can include the formal dress and adornment (robes of state, headdress etc.) the etymology refers to, but also other regalia in the widest sense, such as a throne or other seat of office, the word is a convenient generic term, also for such more specific cases as coronation (see that article and regalia for more on such ceremonies) and enthronement, though these are also used (rather imprecisely, by analogy) in such extended sense.
The term is used to describe the installation of individuals in institutions that usually have been extant from feudal times. For example, the installation of heads of state and various other state functions with ceremonial roles are invested with office. Usually the investiture involves ceremonial transfer of the symbols of the particular office
Judges in many countries, including justices of the Supreme Court of the United States, are invested with their office. American justices typically take two oaths: one to uphold the Constitution of the United States, and the other to apply justice equally. Likewise, university presidents, rectors and chancellors are invested with office.
In the United Kingdom, around 2,600 people are invested personally by The Queen or a member of the Royal Family. A list of those to be honoured is published twice a year, in either the New Year Honours or the Queen's Birthday Honours.
Approximately 24 investitures are held annually in Buckingham Palace and Windsor Castle, one at the Palace of Holyroodhouse in Edinburgh, Scotland. Previously, one investiture ceremony a year would also be held in Cardiff.
There is also a poem written by Siegfried Sassoon called "The Investiture". The poem is about a young man who was killed in battle during World War I.